Database commands.
Add verbose outpout; add flush command.
Some minor clean up.
Add tests for database operations.
Fix for python 2.x compat.
Clean up according to flake8.
Add settigs command to show settings.
Use the regular formatter.
Initial work on alembic integration.
Add alembic as a requirement.
Use the alembic-provided migration script template.
More work towards initial alembic support.